Update examples with dh_params

examples/HttpServer.cpp

@@ -0,0 +1,48 @@
+/* This is a static HTTP(S) server. It caches the files in given root folder and streams them by request */
+
+#include <App.h>
+
+/* Helpers for this example */
+#include "helpers/FileCache.h"
+#include "helpers/Middleware.h"
+
+int main(int argc, char **argv) {
+
+    if (argc < 3 || argc > 7) {
+        std::cout << "Usage: HttpServer root port [ssl_cert ssl_key ssl_dh_params ssl_passphrase]" << std::endl;
+        return 0;
+    }
+
+    int port = atoi(argv[2]);
+    const char *root = argv[1];
+    /* Cache files of root folder */
+    FileCache fileCache(root);
+
+    /* Either serve over HTTP or HTTPS */
+    if (argc > 5) {
+        /* HTTPS */
+        uWS::SSLApp({
+            .cert_file_name = argv[3], /* Required */
+            .key_file_name = argv[4], /* Required */
+            .dh_params_file_name = argv[5], /* Required (in this example) */
+            .passphrase = (argc == 7 ? argv[6] : nullptr) /* Passphrase is optional */
+        }).get("/*", [&fileCache](auto *res, auto *req) {
+            serveFile(res, req)->write(fileCache.getFile(req->getUrl()));
+        }).listen(port, [port, root](auto *token) {
+            if (token) {
+                std::cout << "Serving " << root << " over HTTPS a " << port << std::endl;
+            }
+        }).run();
+    } else {
+        /* HTTP */
+        uWS::App().get("/*", [&fileCache](auto *res, auto *req) {
+            serveFile(res, req)->write(fileCache.getFile(req->getUrl()));
+        }).listen(port, [port, root](auto *token) {
+            if (token) {
+                std::cout << "Serving " << root << " over HTTP a " << port << std::endl;
+            }
+        }).run();
+    }
+
+    std::cout << "Failed to listen to port " << port << std::endl;
+}